A conformable low-profile dual-band WiFi antenna and device

Abstract

The present application discloses a conformable low-profile dual-band WiFi antenna and device, including a radiating unit and a ground plane, wherein the radiating unit is parallel and fixedly connected to the ground plane, and the gap between the radiating unit and the ground plane is 2-3 mm; the radiating unit is provided with an L-shaped groove and a plurality of strip grooves, wherein the plurality of strip grooves are arranged in parallel with the short side of the L-shaped groove, and the length of the plurality of strip grooves gradually decreases from the short side of the L-shaped groove to the edge side of the radiating unit. Since the gap between the radiating unit and the ground plane is 2-3 mm, the cross-section of the antenna is low, so as to facilitate conformal installation on the device housing. Moreover, the radiating unit is provided with an L-shaped groove and a plurality of strip grooves, and the setting of the L-shaped groove enables the antenna to realize dual-frequency characteristics, and the structural setting of the plurality of strip grooves enables the current to present traveling wave characteristics in the strip groove area at high frequencies, thereby realizing the wide bandwidth of the antenna.

Description

Technical Field

[0001] The present application relates to the field of antenna technology, and in particular to a conformable low-profile dual-band WiFi antenna and device. Background Art

[0002] In order to meet more and more functions, electronic devices need to reserve more and more interfaces, such as HDMI interface, data / audio interface, RF interface, etc. However, due to the limitation of the physical size of the device, the number of interfaces must be reduced. Without affecting the performance of the device, the WiFi antenna can be designed to be invisible, such as built-in or conformal. In this way, the space occupied by the external antenna is reduced and the user's acceptance is increased.

[0003] Antenna is one of the important components of wireless system, and its performance is directly related to the communication quality of the system, which puts forward more and more stringent requirements on built-in antenna or conformal antenna, such as small, thin, multi-band operation, etc. Existing technical solutions mostly use built-in antenna installed on printed circuit board, but for electronic equipment with metal shell, such built-in antenna is not applicable.

[0004] For devices with metal cavity shells, if a built-in antenna installed on a printed circuit board is used, it is necessary to "open a window" on the device shell, drill through the metal cavity, and fill it with wave-transmitting material to allow electromagnetic waves to penetrate the cavity. This not only increases the processing difficulty and cost, but also reduces the rigidity of the shell. If a window is not opened in the device shell, the communication quality of the antenna will be affected. Summary of the invention

[0005] In order to solve the above technical problems, this application proposes the following technical solutions:

[0006] In the first aspect, an embodiment of the present application provides a conformable low-profile dual-band WiFi antenna, comprising a radiating unit and a ground plane, wherein the radiating unit is fixedly connected to the ground plane in parallel, and the gap between the radiating unit and the ground plane is 2 to 3 mm; an L-shaped groove and a plurality of strip grooves are arranged on the radiating unit, and the plurality of strip grooves are arranged parallel to the short sides of the L-shaped groove, and the length of the plurality of strip grooves gradually decreases from the short side of the L-shaped groove to the edge side of the radiating unit.

[0007] With the above implementation, since the gap between the radiation unit and the ground plane is 2 to 3 mm, the cross-section of the antenna is low, so that it is easy to be conformally installed on the device housing. In addition, an L-shaped groove and multiple strip grooves are provided on the radiation unit. The L-shaped groove enables the antenna to achieve dual-frequency characteristics. The structural arrangement of multiple strip grooves enables the current to present traveling wave characteristics in the strip groove area at high frequencies, thereby achieving a wide bandwidth of the antenna.

[0008] In combination with the first aspect, in a first possible implementation manner of the first aspect, the strip groove is a semi-closed groove, one end of the strip groove is located in the plane of the radiation unit, and the other end is open and located at the edge of the radiation unit.

[0009] In combination with the first aspect, in a second possible implementation of the first aspect, the ground plane is a rectangular metal sheet, and the length of the ground plane is 57.2 mm to 57.8 mm, and the width is 37.2 mm to 37.8 mm.

[0010] In combination with the first aspect, in a third possible implementation of the first aspect, the plurality of strip grooves are arranged at equal intervals, and the length difference between any two adjacent strip grooves is the same, and the width of each strip groove is the same.

[0011] In combination with the first aspect, in a fourth possible implementation of the first aspect, a short-circuit metal sheet is arranged between the radiation unit and the ground plane, the short-circuit metal sheet is a rectangular metal sheet, the length of the short-circuit metal sheet is 12.2 mm to 12.8 mm, and the width is 2 mm to 3 mm.

[0012] In combination with the fourth possible implementation method of the first aspect, in the fifth possible implementation method of the first aspect, a coaxial feeder is further arranged between the radiation unit and the ground plane, the coaxial feeder is perpendicular to the radiation unit and the ground plane, the coaxial feeder is fixedly connected to the radiation unit and the ground plane respectively, and one end of the coaxial feeder is located at a corner position of the radiation unit.

[0013] In combination with the fifth possible implementation of the first aspect, in a sixth possible implementation of the first aspect, a feeding solder point of the antenna is provided on the radiation unit, an antenna grounding solder point is provided on the ground plane, and the coaxial feed line is fixedly connected to the feeding solder point and the grounding solder point, respectively.

[0014] In combination with the first aspect, in a seventh possible implementation manner of the first aspect, the radiation unit is a rectangular metal sheet, and the length of the radiation unit is 25.1 mm to 25.7 mm, and the width is 23.5 mm to 24.1 mm.

[0015] In combination with the seventh possible implementation manner of the first aspect, in an eighth possible implementation manner of the first aspect, the L-shaped groove is arranged on one side of the radiation unit, and the plurality of strip grooves are arranged at corners of the radiation unit.

[0016] In a second aspect, an embodiment of the present application provides a device, wherein an antenna as described in the first aspect or any possible implementation of the first aspect is provided on a housing of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the structure of a conformable low-profile dual-band WiFi antenna provided in an embodiment of the present application;

[0018] Figure 2 A schematic diagram of the structure of a radiation unit provided in an embodiment of the present application;

[0019] Figure 3 A schematic diagram of a return loss curve of a conformable low-profile dual-band WiFi antenna provided in an embodiment of the present application;

[0020] Figure 4 A schematic diagram of a conformable low-profile dual-band WiFi antenna in the vertical plane direction at 2.44 GHz provided in an embodiment of the present application;

[0021] Figure 5 A schematic diagram of a conformable low-profile dual-band WiFi antenna in the vertical plane direction at 5.5 GHz provided in an embodiment of the present application;

[0022] Figure 6 A schematic diagram of a maximum gain curve of a conformable low-profile dual-band WiFi antenna in the entire frequency band provided in an embodiment of the present application;

[0023] Figure 7 A schematic diagram of a structure of a device provided for an application embodiment;

[0024] Figures 1 to 7 In the symbol, it is represented as:

[0025] 1-radiating element, 11-L-shaped slot, 12-first strip slot, 13-second strip slot, 14-third strip slot, 15-fourth strip slot, 16-fifth strip slot, 2-ground plane, 3-short-circuit metal sheet, 4-coaxial feed line. DETAILED DESCRIPTION

[0026] The present solution is described below in conjunction with the accompanying drawings and specific implementation methods.

[0027] Figure 1 A structural diagram of a conformable low-profile dual-band WiFi antenna provided in an embodiment of the present application, see Figure 1 The conformable low-profile dual-band WiFi antenna provided in an embodiment of the present application includes: a radiation unit 1 and a ground plane 2, wherein the radiation unit 1 is fixedly connected to the ground plane 2 in parallel, and the gap between the radiation unit 1 and the ground plane 2 is 2 to 3 mm.

[0028] In the embodiment of the present application, the ground plane 2 is a rectangular metal sheet, the length of the ground plane 2 is 57.2 mm to 57.8 mm, and the width is 37.2 mm to 37.8 mm. If it is installed in parallel with the metal shell of the electronic device, the metal shell of the electronic device can be used as the ground plane.

[0029] A short-circuit metal sheet 3 is provided between the radiation unit 1 and the ground plane 2 to connect the radiation unit 1 and the ground plane 2. The short-circuit metal sheet 3 is a rectangular metal sheet with a length of 12.2 mm to 12.8 mm and a width of 2 mm to 3 mm.

[0030] A coaxial feed line 4 is also arranged between the radiation unit 1 and the ground plane 2. The coaxial feed line 4 is perpendicular to the radiation unit 1 and the ground plane 2. The coaxial feed line 4 is fixedly connected to the radiation unit 1 and the ground plane 2 respectively, and one end of the coaxial feed line 4 is located at a corner position of the radiation unit 1.

[0031] Specifically, the radiating unit 1 is provided with an antenna feeding soldering point, the grounding plane is provided with an antenna grounding soldering point, and the coaxial feed line 4 is fixedly connected to the feeding soldering point and the grounding soldering point respectively.

[0032] See also Figure 2 The radiation unit 1 is a rectangular metal sheet, the length of the radiation unit 1 is 25.1 mm to 25.7 mm, and the width is 23.5 mm to 24.1 mm. The radiation unit 1 is provided with an L-shaped groove 11 and a plurality of strip grooves, the plurality of strip grooves are arranged parallel to the short sides of the L-shaped groove 11, and the lengths of the plurality of strip grooves gradually decrease from the short side of the L-shaped groove 11 to the edge side of the radiation unit. The L-shaped groove 11 is arranged on one side of the radiation unit 1, and the plurality of strip grooves are arranged at the corners of the radiation unit 1.

[0033] The L-shaped slot 11 is a closed slot, which is the key to the antenna realizing dual-band operation. The L-shaped slot 11 does not cut off the edge of the rectangular metal sheet, so that the high-frequency current mainly flows along the inner side of the "L"-shaped slot to the strip slot area and radiates out, while the low-frequency current is radiated by the entire metal sheet.

[0034] See also Figure 2 The strip grooves in the embodiment of the present application include a first strip groove 12 , a second strip groove 13 , a third strip groove 14 , a fourth strip groove 15 and a fifth strip groove 16 .

[0035] The first strip groove 12, the second strip groove 13, the third strip groove 14, the fourth strip groove 15 and the fifth strip groove 16 are all semi-closed grooves, one end of which is located in the plane of the radiation unit 1, and the other end is open and located at the edge of the radiation unit 1. The plurality of strip grooves are arranged at equal intervals, and the length difference between any two adjacent strip grooves is the same, and the width of each strip groove is the same.

[0036] That is to say, the widths of the first strip groove 12, the second strip groove 13, the third strip groove 14, the fourth strip groove 15 and the fifth strip groove 16 are the same, and the spacings between adjacent strip grooves are also the same. The length difference between the first strip groove 12 and the second strip groove 13 is the same as the length difference between the second strip groove 13 and the third strip groove 14, and so on.

[0037] The first strip groove 12, the second strip groove 13, the third strip groove 14, the fourth strip groove 15 and the fifth strip groove 16 are the key to achieve high-frequency and wide-band operation. The strip grooves of different sizes and positions are used so that the current in the area presents traveling wave characteristics at high frequency, thereby achieving wide bandwidth. If the first strip groove 12, the second strip groove 13, the third strip groove 14, the fourth strip groove 15 and the fifth strip groove 16 are located in parallel in a concentrated area and the edges of the rectangular metal sheet are cut off, the remaining part becomes an oscillator, participates in the radiation of the high-frequency band, and expands the high-frequency bandwidth.

[0038] See also Figure 3 It can be seen from the return loss curve of the conformable low-profile dual-band WiFi antenna provided in the embodiment of the present application that the conformable low-profile dual-band WiFi antenna provided in the present application has low loss and can enable the antenna to be installed on the device and work quickly.

[0039] Depend on Figure 4 and Figure 5 It can be seen that at the 2.44 GHz and 5.5 GHz frequency bands, it can be seen from the vertical plane radiation diagram that the conformable low-profile dual-band WiFi antenna provided by the present application can achieve dual-band and has a large lobe angle.

[0040] Depend on Figure 6 It can be seen that the conformable low-profile dual-band WiFi antenna provided in the embodiment of the present application maintains a relatively large gain in the entire frequency band, so that the antenna can achieve a good coverage effect.

[0041] It can be seen from the above embodiments that the conformable low-profile dual-band WiFi antenna provided in the embodiments of the present application has a small overall size and a low profile, which is convenient for conformal installation on the device housing. The antenna body is made of metal sheets and has low cost. An L-shaped slot 11 and a plurality of strip slots are provided on the radiation unit 1. The setting of the L-shaped slot 11 enables the antenna to achieve dual-frequency characteristics. The structural setting of the plurality of strip slots enables the current to present traveling wave characteristics in the strip slot area at high frequencies, thereby achieving a wide bandwidth of the antenna. The antenna has good standing waves only within the working frequency band and is not easily interfered by out-of-band signals. The antenna has high gain and a large lobe angle, and can achieve a good coverage effect.

[0042] Corresponding to the embodiment of a conformable low-profile dual-band WiFi antenna provided in the above embodiment, the present application also provides an embodiment of a device, specifically an electronic device, see Figure 7 The housing of the device is provided with a conformable low-profile dual-band WiFi antenna provided in the above embodiment.

[0043] Specifically, the electronic device in this embodiment is an electronic device with a metal casing. By using the conformable low-profile dual-band WiFi antenna of the above embodiment, the antenna can be quickly set on the device casing, thereby enabling the device to achieve good communication through the high gain and large lobe angle of the antenna, which can achieve good coverage.

[0044] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0045] Of course, the above description is not limited to the above examples. Technical features not described in the present application can be achieved by or by using existing technologies, which will not be repeated here. The above embodiments and drawings are only used to illustrate the technical solution of the present application and are not limitations of the present application. For example, the present application is only described in detail in combination with and with reference to the preferred implementation methods. Ordinary technicians in this field should understand that the changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present application do not depart from the purpose of the present application and should also fall within the scope of protection of the claims of the present application.

Claims

1. A conformable low-profile dual-band WiFi antenna, characterized in that: It comprises a radiation unit and a ground plane, wherein the radiation unit is fixedly connected to the ground plane in parallel, and the gap between the radiation unit and the ground plane is 2 to 3 mm; The radiation unit is provided with an L-shaped groove and a plurality of strip grooves, the plurality of strip grooves are arranged parallel to the short sides of the L-shaped groove, and the lengths of the plurality of strip grooves gradually decrease from the short sides of the L-shaped groove to the edge sides of the radiation unit; The strip groove is a semi-closed groove, one end of which is located in the plane of the radiation unit, and the other end is open and located at the edge of the radiation unit; The plurality of strip grooves are arranged at equal intervals, and the length difference between any two adjacent strip grooves is the same, and the width of each strip groove is the same.

2. The conformable low-profile dual-band WiFi antenna according to claim 1, characterized in that: The ground plane is a rectangular metal sheet, and the length of the ground plane is 57.2 mm to 57.8 mm, and the width is 37.2 mm to 37.8 mm.

3. The conformable low-profile dual-band WiFi antenna according to claim 1, characterized in that: A short-circuit metal sheet is arranged between the radiation unit and the ground plane. The short-circuit metal sheet is a rectangular metal sheet with a length of 12.2 mm to 12.8 mm and a width of 2 mm to 3 mm.

4. The conformable low-profile dual-band WiFi antenna according to claim 3, characterized in that: A coaxial feeder is also arranged between the radiation unit and the ground plane. The coaxial feeder is perpendicular to the radiation unit and the ground plane. The coaxial feeder is fixedly connected to the radiation unit and the ground plane respectively. One end of the coaxial feeder is located at a corner position of the radiation unit.

5. The conformable low-profile dual-band WiFi antenna according to claim 4, characterized in that: The radiation unit is provided with a feeding soldering point of the antenna, the grounding plane is provided with a grounding soldering point of the antenna, and the coaxial feed line is fixedly connected to the feeding soldering point and the grounding soldering point respectively.

6. The conformable low-profile dual-band WiFi antenna according to claim 1, characterized in that: The radiation unit is a rectangular metal sheet, and the length of the radiation unit is 25.1 mm to 25.7 mm, and the width is 23.5 mm to 24.1 mm.

7. The conformable low-profile dual-band WiFi antenna according to claim 6, characterized in that: The L-shaped groove is arranged at one side of the radiation unit, and a plurality of the strip-shaped grooves are arranged at the corners of the radiation unit.

8. A device, characterized in that: The housing of the device is provided with a conformable low-profile dual-band WiFi antenna as described in any one of claims 1-7.

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